Staging: wilc1000: wilc_wfi_cfgoperations: Remove irrelevant wrapper function

Remove the wrapper function WILC_WFI_add_wilcvendorspec() and replace
its call with memcpy().

Signed-off-by: Shivani Bhardwaj <shivanib134@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>